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Plant and Cell Physiology, 1970, Vol. 11, No. 4 631-638
© 1970

Article

Further studies on the role of cell-wall-degrading enzymes in cell-wall loosening in oat coleoptiles

YOSHIO MASUDA, SUSUMU OI and YUKIO SATOMURA

Department of Biology, Faculty of Science, Osaka City University Sumiyoshi-ku, Osaka, Japan

A fungal endo-ß-l,3-glucanase was compared with a fungal exo-ß-1,3-glucanase with respect to their effects on elongation and cell-wall extensibility in oat coleoptile segments. The exo-enzyme enhanced elongation and extensibility of the cell wall. Its effect was not additive to the effect of indole-3-acetic acid when given together with the latter, at least during 3 hr of incubation. Endo-glucanase showed no significant effect on elongation and no interaction with the exo-enzyme. Auxin and exo-glucanase increased extensibility of the cell wall. The exo-glucanase was separated by isoelectric focusing. The two fractions which were separated and showed glucanase activity induced elongation and cell wall loosening.

(Received March 16, 1970; )
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